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Subject[PATCH 5/6] KVM: arm64: pkvm: Stub io map functions
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Now that GICv2 is disabled in nVHE protected mode there should be no
other reason for the host to use create_hyp_io_mappings() or
kvm_phys_addr_ioremap(). Add sanity checks to make sure that assumption
remains true looking forward.

Signed-off-by: Quentin Perret <qperret@google.com>
---
arch/arm64/kvm/mmu.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index 326cdfec74a1..605c104eb030 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -407,6 +407,9 @@ int create_hyp_io_mappings(phys_addr_t phys_addr, size_t size,
unsigned long addr;
int ret;

+ if (is_protected_kvm_enabled())
+ return -EPERM;
+
*kaddr = ioremap(phys_addr, size);
if (!*kaddr)
return -ENOMEM;
@@ -650,6 +653,9 @@ int kvm_phys_addr_ioremap(struct kvm *kvm, phys_addr_t guest_ipa,
KVM_PGTABLE_PROT_R |
(writable ? KVM_PGTABLE_PROT_W : 0);

+ if (is_protected_kvm_enabled())
+ return -EPERM;
+
size += offset_in_page(guest_ipa);
guest_ipa &= PAGE_MASK;

--
2.34.1.400.ga245620fadb-goog
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